Danny,
Promos are a good way to incentivize potential consumers, but first people need to know and love the content, before thinking "oh! 15 for the price of 12 is good!"
Is there any consideration of some promos on single issues as an introduction?
My $0.02...
In honor of March Madness (ok, it's really just because I like to think of excuses to give away stuff - and I want you to read my blog
) - we are doing a promotion (only good in March):
http://www.chess.com/article/view/the-masters-bulletin-march-2014
Subscribe to the Master's Bulletin for 1 year and use code "marchmadness789" at checkout and get 15-months subscription for the price of 12-months!
The "who referred you box" looks like this http://grab.by/vjF4 at checkout.
After completing, post a note in our group here saying that you used the March Madness Code http://www.chess.com/groups/home/the-masters-bulletin in order to receive proper credit!
Happy Bracketology! And Happy Master's Bulletin! March Madness for everyone!